# al-shifted-echo-amplitude-selective-40-filtering-p1.in # approach: filtering the desired coherences (-5Q and +5Q) after the first pulse # and (5Q, 1Q, -3Q) after the second pulse # spin-5/2 echo and antiecho amplitude optimization # versus the first-pulse duration # in three-pulse shifted-echo amplitude-modulated 5Q-MAS sequence, # the second-pulse duration p2 = 4 micro seconds # the third-pulse duration p3 = 2 micro seconds spinsys { channels 27Al nuclei 27Al quadrupole 1 2 3e6 0 0 0 0 } par { spin_rate 5000 variable tsw 0.25 sw 1.0e6/tsw np 17 crystal_file rep10 gamma_angles 10 proton_frequency 800e6 start_operator 40*I1z detect_operator I1c verbose 1101 variable rf 90000 variable rf3 9300 variable p2 4 variable p3 2 } proc pulseq {} { global par maxdt $par(tsw) matrix set 1 coherence {-5 5} matrix set 2 coherence {5 1 -3} acq -y for {set i 1} {$i < $par(np)} {incr i} { pulse $par(tsw) $par(rf) x store 2 filter 1 pulse $par(p2) $par(rf) x filter 2 pulse $par(p3) $par(rf3) x acq -y reset prop 2 } } proc main {} { global par fsave [fsimpson] $par(name).fid puts "Larmor frequency (Hz) of 27Al: " puts [resfreq 27Al $par(proton_frequency)] } # SIMP # NP=17 # SW=4000000 # TYPE=FID # DATA # 0 0 # 4.67751251e-10 -9.80926173e-12 # 2.16003172e-07 6.58151177e-10 # 6.97916629e-06 8.41767311e-08 # 7.27948632e-05 1.2687444e-06 # 0.000395923677 8.48360795e-06 # 0.00139044448 3.45473377e-05 # 0.00353265456 9.92390208e-05 # 0.00694414416 0.000218745186 # 0.0110187674 0.000391440298 # 0.0145153114 0.000595039851 # 0.0161814141 0.000803731702 # 0.0154764758 0.00101480504 # 0.0128514965 0.00126219048 # 0.00941835071 0.00160316529 # 0.00630420268 0.00208581127 # 0.0041292242 0.00271822963 # END